Adjustable lamp fixture



May 21, 1929.

M. F. DEACH ADJUSTABLE LAMP FIXTURE Filed May 31 1927 ATTORNEY Patented May 21, 1929.

UNITED STATES MILES VF. DEACH, or OAKLAND, CALIFORNIA.-

ADJUSTABLE LAMP FIXTURE.

Application filed May 31, 1927. Serial No. 195,377.

This invention relates to improvements in electric fixtures and in particular to that class of fixtures shown and described in my former Patent No. 1,449,658, issued March 27 1923, r and my 'co-pending application filedJuly 16, 1924, Serial No. 726,399;

The present construction has several improvements not found in ,my former patents, viz, a cast supporting arm having .a rigidly mounted standardproviding a memher upon which is revolubly mounted a yoke, the yoke in turn being provided with a retaining member through which the lamp rod is inserted, the said standard being provided with yelding engaging means adapted to prevent the free rotational movement of the yoke relative thereto, and the retaining member being provided with like means adapted to yieldingly hold the lamp rod in adjusted position. The said yoke is additionally provided with adjustable means adapted to cause the yoke clamp members to frictionally embrace the retaining member to provide positive means adapted to hold the lamp rod inany desired position relativeto the standard. g

An object of my invention is to provide an improved electric fixture adapted for general use and which is neat apperance, comparatively cheap to manufacture, and one that may be easily adjustedto any d e- ,siredposition relative to itssupport.

. Another object of my invention is to pro- 7 vide a fixture of the type designated that embodies in its construction', means adapting it to be readily adjusted toany desired position relative to its support and means adapted to yieldinglyrretain itin such adjusted position.

r. Still another object of the invention is to provide an electric fixture in which a novel and cheap method is employed in securing together the'various parts constituting thedevice after their assemblage.

' Other objects and advantagesof my invention will be apparent with reference to the annexed drawing forming a partof this specification and in which Figure 1 is a side elevation illustrating an embodiment of my invention;

Figure 2 isa planview illustrating one a of the various positions to which the fixture; may be adjusted relative to its fixed support c Figure 3 is an enlarged sectional detail of fa portionof the supporting arm including the rigidly mounted standard, revoluble yoke, retaining member and lamp rod, also tne yielding retaining means for said yoke and lamp red, the section being indicated by theline 33 of Figure 4;

Figure 4- is a sectionaldetailtaken through the parts shown in Figure 3, the section being indicated by the line 1-4 thereof; and

Figure 5 is an edge view of the cup members constituting the retaining member."

Referring to "the drawings, the numeral 110 designates a supporting bracket secured in place upon the wall or othe'rsupport 11 by the screws 12 and which bracket is pro-' vided with a horizontally disposedlug'13, which in turn carries a, vertically disposed spindle 14. r

The supporting arm 15 consists of ajcast member provided at one end with a split member 16 having a socket formed the-rein and adapted to receive the spindle leof the bracket and a clamp member ,17 providing means'for rigidly clamping the arm 15 in any desired position relative to the spindle 14:- The other end of the arm 15 is provided with an opening 18 to receive a standard19, Figure '3, which standard may be threaded at its lower end and screw-seated in the threaded opening 18. Becesses 21 and 22 are provided in opposite sides ofthe stand ard and form elongated housings for yield ingmembers, such as, bowed flat springs 23' and 24 that normally bulge outwardlyslightly beyond the cylindrical surface of said standard. The upper end ofthe stand-- ard is provided with a head 25"having an exteriorgroovel26 to form retaining means.

hereinafter described. 7 r v A yoke 27 is mounted upon' the standard 19 and consists of a sleeve 28 having an inside diameter to permit a snug rotatable fit about the standard and is revolubly retained thereon by means of a nub 29, Fig.4, formed in the wall of the sleeve by a punch indent 30, the said nub being so positioned that it which is secured a retaining member 33.

edges abuttingfand one of thecups is proto spring'relative' to each other and between its edges to the inside walls thereof. The

vided with a cross-bar 36rspot welded at shown in Figure 5. 116 openings 40 and 41 V are slightly larger in diameter than the outside diameter of the tubular member 38 so that said member 38 may be readily inserted therein and held in frictional Contact with the lower edges of said openings by means of a yielding member '43 similar tothe me1nhers-'23 and 24, and when positioned has its free ends contacting inbinding engagement with the crossbar 36 and its intermediate section bowed outwardly and impinging against the upper surface of the tubular member It will be readily seen that the member 38 may be reciprocatively slid through the openings 40 and 41 to adjust the lamp '37 longitudinally, or it may be rotated relative to the member 33, or swung in a vertical or a horizontal plane, or adjusted angularly to any desired position and will be frictionally held in adjusted position relativeto the member 38 by the yielding spring member 43.

The side faces of the cup members 34 and 3 5 are provided with concentrically-positioned concavo-oonvex sections 44 and 45 through which perforations 46 and 47 are provided for the reception of a clamp bolt hereinafter described, said sections 44 and 45 presenting annular bearing surfaces 48 and 49 positioned on opposite sides of the member 33 and adapted to fit bet-ween the ears '31 and 32 of the yoke 31.

Tension members 50 and 51 are positioned against opposite outside faces of the ears 31 and 32 and are provided with central perforationscorresponding with the perforations formed in the ears 31 and 32 and the cup perforations 46 and 47, and a clamp bolt extends through all of these members and is provided with a nut 53 adapted, when properly adjusted, to put tension upon the various parts to causethe cars 31 and 82 to frictionallyembrace the bearing surfaces 48 and 49 of the member I claim:

1. In a device of the class described, a standard, a; yoke carried by said standard for coaxial rotation with respect thereto, a rod retaining member carried by said yoke, a lamp-supporting rod slidably mounted in said retaining member for longitudinal movement through said yoke, yielding means mounted in said standard and adapted to "trictionally engage said yoke to normally retain said yoke in adjusted position, and

yielding means mounted in said retaining member adapted to frictionally engage said lamp rod.

2. In a device of the class described, a standard, a yoke carried by said standard, a rod retaining member carried by said yoke and provided with perforations, a. lamp rod mounted in said retaining member and supported in said perforations for longitudinal adjustment therethrough, and yielding means mounted in said standard and in said retaining member and adapted to frictionally hold said yoke and lamp rod in adjusted positions. t

3. In a device of the class described, a. supporting member adapted to be rigidly mounted, a radially movable arm associated with said supporting'member, a standard carried by said arm, a yoke mounted upon said standard and consisting of a sleeve having ears formed at its upper end, a retaining member interposed between said ears and provided with perforations, a lamp rod slidably mounted in said perforations, yielding means mounted in said retaining member and positioned to engage said rod to frictionally retain the same against movement, and yielding means mounted in said standard and positioned to engage said yoke sleeve to frictionally hold it against rotational movement relative to said standard.

4. In a device of the class described, a supporting member, a radially movable arm associated therewith, a rigidly mounted standard carried by said arm, a yoke mounted upon said standard and consisting of a sleeve adapted for revoluble-movement relative to said standard and having ears formed at its upper end, a retaining member interposed between said ears, means carried by said ears adapted to frictionally embrace said retaining member, perforations formed in opposite sides of said retaining member, a lamp rodmounted in said perforations and slidably adjustable relative to said retaining member, yielding means carried by said standard and adapted to frictionally engage saidsleeve, and yielding means carried by 7 said retaining member and adapted to frictionally engage said rod.

' 5. In a device of theclass described, a supporting member, a radially movable arm as sociated therewith, a rigidly mounted standard carried by said arm, a yoke mounted upon said standard and consisting of a sleeve adapted for revoluble movement relative to said standard and having resilient ears formed at its upper end, a retaining member interposed between said ears, means carried by said ears adapted to frictionally embrace said retaining member, perforations formed in opposite sides of said retaining member, a lamp rod mounted insaid perforations and slidably adjustable relative to said retaining member, retaining means carried by said sleeve and standard and adapted to prevent their disassemblage, yielding means carried by said standard and adapted to fr'ictionally engage said sleeve, and like yielding means carried by said retaining member and adapted to frictionally engage said rod.

6. In a device of the class described, a support, a retaining member mounted thereon for horizontal and vertical swinging movement, said retaining member consisting of an annular hollow member having a passage therethrough defining a chord of its circle, a lamp rod slidably mounted in said passage, frictional means embracing said retaining member and adapted to prevent its free movement relative to itssupport, and yielding means carried by said retaining member and adapted to frictionally engage said rod to prevent its free movement relative thereto.

7. In a device of the class described, a support, a retaining member mounted thereon for horizontal and vertical swinging movement relative thereto, said retaining member consisting of a pair of cup members having their edges abutting to form a hollow annular member, a partition strip mounted in said retaining member, and perforations formed in opposite walls thereof, a lamp rod slidably mounted in said perforations, frictaining member.

8. In a device of the class described, a support, a retaining member mounted thereon for horizontal and vertical swinging movement. relativei thereto,- said retaining member consisting of a pair of cup members having their edges abutting to'form a hollow' annular member, a partition strip mounted in said retaining member, and perforations formed in opposite walls thereof, a lamp rod slidably mounted in said perforations, said perforations being larger in diameter than said rod,'frictional'means embracing said'retaining member and adapted to'oppose its free swinging movement rela- In testimony whereof, I afiix my signature.

MILEs F. DEAGH.

tive to its support, and'yielding means in-' terposed between said partition strip and said rod. 

